The product is a lot of 5 blocks of 4 US Federal Duck Stamps, including the denominations RW40 through RW44. These stamps feature a multi-color design with a duck theme, and were issued between 1971-1980 in the United States. Each block is in Mint Never Hinged quality, making them ideal for collectors looking for pristine stamps. The stamps are from the United States and are uncertified, providing a unique addition to any stamp collection focused on duck stamps.